Good Morning and welcome! I am Dr. Loretta, a licensed veterinarian and I am happy to answer your question.
I am sorry to hear about Poppy's behavior but this is normal when they are ypoung energetic puppies. The first thing to do is to get a DAP Collar that is a canine pheromone that acts as a calming agent and will decrease her anxiety when in contact with other dogs. This can be purchased at the pet store or online.
Next, take her back ot a good obedience school and never allow her off the leash until you can control her. This may take a few weeks to months until Poppy understands that you are the "Alpha Dog" and she will listen to you.
In the meantime, take her for more walks and keep her entertained by playing ball with her and extra attention....at this age, they crave attention, even from other dogs. Getting her worn out will help.
Does that make sense to you?
Please let me know if you have ANY other questions. My goal is to give you 100% satisfaction and if you are not yet satisfied, please REPLY so I can clarify for you.
Sincerely, XXXXX XXXXX
Thank you so much, Patricia, for your kind rating. It is very much appreciated! Even though you have rated, we can still communicate. If you have other questions, please Reply. I am always happy to help.
Have a wonderful day!